Simms Fishing Men's Flyweight Access BootYour lean, mean, trail to river machine. Flyweight Men's Wading Boots cut ounces in exchange for maximum output, relentless grip, and standup stability and comfort. Optimized for best in class wet slip resistance, the Vibram Idrogrip Flex outsole is engineered with a rubber compound that is softer and therefore grippier than the sole materials in other Simms wading boots. Vibram Idrogrip Flex Soles provide best in class wet and slip resistance.